iwlwifi: mvm: export last bt_notif through debugfs

This will allow to track how BT core updates the driver.
This is required to debug the BT Coexistence mechanism.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/mvm/mvm.h b/drivers/net/wireless/iwlwifi/mvm/mvm.h
index a1f1a86..203eb85 100644
--- a/drivers/net/wireless/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/iwlwifi/mvm/mvm.h
@@ -337,6 +337,7 @@
 
 	/* BT-Coex */
 	u8 bt_kill_msk;
+	struct iwl_bt_coex_profile_notif last_bt_notif;
 };
 
 /* Extract MVM priv from op_mode and _hw */